As the high elves fought for their lives against the trolls' fierce onslaught, the scattered, nomadic humans of Lordaeron fought to consolidate their own tribal lands. The tribes of early humanity raided each other's settlements with little heed for racial unification or honor. Yet one tribe, known as the Arathi, saw that the trolls were becoming too great a threat to ignore. The Arathi wished to bring all of the tribes under its rule so that they could provide a unified front against the troll warbands.

Over the course of six years, the cunning Arathi outmaneuvered and outfought the rival tribes. After every victory, the Arathi offered peace and equality to the conquered people; thus, they won the loyalty of those they had beaten. Eventually the Arathi tribe came to include many disparate tribes, and the ranks of its army grew vast. Confident that they could hold their own against the troll warbands or even the reclusive elves if need be, the Arathi warlords decided to construct a mighty fortress city in the southern regions of Lordaeron. The city-state, named Strom, became the capital of the Arathi nation, Arathor. As Arathor prospered, humans from all over the vast continent traveled south to the protection and safety of Strom.

United under one banner, the human tribes developed a strong, optimistic culture. Thoradin, the king of Arathor, knew that the mysterious elves in the northlands were under constant siege by the trolls, but refused to risk the safety of his people in defense of reclusive strangers. Many months passed as rumors of the elves' supposed defeat trickled down from the north. It was only when weary ambassadors from Quel'Thalas reached Strom that Thoradin realized how great the troll threat truly was.

The elves informed Thoradin that the troll armies were vast and that once the trolls had destroyed Quel'Thalas, they would move on to attack the southlands. The desperate elves, in dire need of military aid, hastily agreed to teach certain select humans to wield magic in exchange for their help against the warbands. Thoradin, distrustful of any magic, agreed to aid the elves out of necessity. Almost immediately, elven sorcerers arrived in Arathor and began to instruct a group of humans in the ways of magic.

The elves found that although humans were innately clumsy in their handling of magic, they possessed a startling natural affinity for it. One hundred men were taught the very basics of the elves' magical secrets: no more than was absolutely necessary to combat the trolls. Convinced that their human students were ready to aid in the struggle, the elves left Strom and traveled north alongside the mighty armies of King Thoradin.

The united elf and human armies clashed against the overwhelming troll warbands at the foot of the Alterac Mountains. The battle lasted for many days, but the unflagging armies of Arathor never tired or gave an inch of ground before the troll onslaught. The elven lords deemed that the time had come to release the powers of their magic upon the enemy. The hundred human magi and a multitude of elven sorcerers called down the fury of the heavens and set the troll armies ablaze. The elemental fires prevented the trolls from regenerating their wounds and burned their tortured forms from the inside out.

As the troll armies broke and attempted to flee, Thoradin's armies ran them down and slaughtered every last one of their soldiers. The trolls would never fully recover from their defeat, and history would never see the trolls rise as one nation again. Assured that Quel'Thalas was saved from destruction, the elves made a pledge of loyalty and friendship to the nation of Arathor and to the bloodline of its king, Thoradin. Humans and elves would nurture peaceful relations for ages to come.